diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c
--- a/sys/kern/kern_prot.c
+++ b/sys/kern/kern_prot.c
@@ -2238,11 +2238,6 @@
  * Change process credentials.
  * Callers are responsible for providing the reference for passed credentials
  * and for freeing old ones.
- *
- * Process has to be locked except when it does not have credentials (as it
- * should not be visible just yet) or when newcred is NULL (as this can be
- * only used when the process is about to be freed, at which point it should
- * not be visible anymore).
  */
 void
 proc_set_cred(struct proc *p, struct ucred *newcred)